Carburetor



Nov. 11, 1930. J, STAPELLE I 1,781,087

CARBURETOR Fil ed Jun 20, 1924 z I f3 Pa.tented Nov. 11, 1930 UNITED STATES, I OFFICE JOSEPH STAPELLE, OF BRUSSELS, BELGIUM, ASSIGLTQB;T'O PAUL MEUNIER, OF I FLEURUS, BELGIUM j V V CARBURETOR Application filed June 20, 1924, Serial No. 721,254, and in- Belgium June 26, 1923.

The purpose of the invention is to provide a carburetor, intended. more specially for antomobile engines, which in particular Wlll enable a more thorough mixture of the car- 5 bureted air and fuel and easier starting and acceleratlon to be obtained, at the same time insuring a much smaller fuel consumptlon.

For the above purpose the invention consists essentially in combining with an ad ustable air intake around and lengthwise of the main jet, a second air intake, also adjustable, but coming in laterally, around'and ap-- proximately at the level of the funnel shaped outlet of the said main jet, allowing the 'air to enter in one or several streams, currents,

or waves, these streams of air beingemitted by holes, slits or windows cut radially in the walls of the choke tube at the same or at different levels and directed perpendicularly to the axis of the said main jet.

Accessorily, and in combination with the above essential arrangement, the invention also consists in providing an auxiliary jet or idling and compensating jet which is surrounded by a sleeve forming an annular air supply conduit at its base and if necessary towards the top of the jet, and making a carbureting chamber above the said jet which communicates with the outlet from the car- 0 buretor above the shutter or butterfly throtof the intake conduit 6 provided with a venturi f, which conduit is supplied with air by a lower opening 0. Around the conduit e is an annular chamber 9 communicating with the atmosphere by an opening h.

About on a level with the outlet 1) of the jet a openings, slits or windows are cut in the walls of the conduit 0 such as i j, preferably in pairs diametrically opposite but which can be advantageously at different levels. r

The conduit 70 bringingthe liquid fuel from the float chamber Z to the main nozzle a, also supplies the auxiliary nozzle The latter is placed in the annular chamber g and is surrounded by a tubular sleeve a with holes through the lower part forming'air intakes. Above the nozzle m this sleeve forms a 'carbur'eting chamber which communicates with thesuction tube 6 above the butterfly valve p, through a connecting tube 9 and a recess-p in the valve. j

" The openings, slits, windows or nozzles are directedperpendicularly'to the nozzle a. The number, the shape, the area, and the position of these openings will be. suitably determined by tests. a v

' The operation of the carburetor thus formed-is as follows: p

Under the effect of the rarefaction caused in the vertical conduite by the suction of'the engine, the air necessary for carbureting'enters' into the said conduit through the lower opening 0 and 'als'othrough the lateral openings 11 y. v

' The fair drawnin through the lower-opening to the conduit erises, flowing parallel to the nozzle (1, and carries away the streamof liquid emitted by the'said nozzle at the same time atomizing the liquid. On the other "hand, the air drawnin through the openings z j, the direction ofwhich is perpendicular to the said nozzle, forms perpendicular streams, currents or waves of air flowing againsteach other, for the purpose of thor-V oughly mixing the carbureted fuel and finely dividing the spray carried away by the verti-' cal current of air.

The openings 2' j are placed at slightly 'dif V ferent levels so as to increase the length of the zone in which the mixing action of the lateralair currents is exerted.

The use of an annular chamber g for supplying air to the lateral windows i y, enables the latter to be removed from the influence of exterior air currents which would act differently on each one on account of the motion of the vehicle and the action of the fan. i

Moreover, the use of a single intake tube h to the said chamber enables the area of the air passage to be easily adjusted, J v

The sleeve .11 is provided with air intake openings '9", which are hereshown as approximately-at the height of-thefcompensating 'nozz1e*m-and whili.,,provi,delateraliiaincur- V rents analogous to those aroundlthe main nozzle, v I L .The invention finally proV idesthat the any appropriate means. V \VhatIclai-misi- I v 1. A carburetor comprising a body having an outer-Walland aninner Wall spaced from the outer Wall'to form ani-auxil iary-air chamber therebetween and also having amain -air inlet opening communic ating with thelower 2 end of the ;-mixingiohan ber formed by saidin} ner Wall, and an air inlet opening commi'inieating with the said auxiliary-aircharnber a fuel supply :nozzle arranged in said mixing chamber; the Wall of said mixing chamber having. air inletozpening s' lea-ding Ffrom the auxiliary air chamber, :an idling f uel :supply nozzlemrranged in saidf'auxiliary mixing ohaniben a gtube inksaid au xo-iliary -.nuixing chamber communicating at its; upper end er Tend anranged aroundwand spacedfrom H said idling'fuel supply nozzle and provided Withfair intake openings,

2. A carburetor-was claimed in olaim;;1 ,ineluding-.also a:butterfly yalve in said mixing chamber and a duct whichestabl shesfcommu nioatio'n .gbetw een 'said tube and said :niixing I chamber. Zand=va butter1iy zvalve soarranged in said mixingphamber that=said1 duotkestab- 4Q lishes such communication"irrespeetiyej-bf whether'said vvalue is-in closed or op'en :posi-- tion. I

1-11 wi tnesswher eoflaflix my signature. 7

- 7 iJOSEPH-STAPELLEM;

.chamber gandthe conduit 6 may be s-iippl-ied v I i ith compressed all previously heated' by I I i Withthe,Inixingchamber ancl havingdts'loW- j 

